Hartney is an unincorporated urban community in the Municipality of Grassland within the Canadian province of Manitoba that held town s…Hartney is an unincorporated urban community in the Municipality of Grassland within the Canadian province of Manitoba that held town status prior to January 1, 2015. It lies along the banks of the Souris River. Originally established in 1882, the community is named after James Harvey Hartney, an early postmaster in the district.